  /* 
    1、星号那里
      新增CSS3盒子模型
    2、项目完成后
      可以将星号改为具体标签
      用到哪些写哪些，不用到的不写，提高渲染速度
  */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  em,
  i {
    font-style: normal;
  }
  li {
    list-style: none;
  }
  img {
    border: 0;
    vertical-align: middle;
  }
  button {
    cursor: pointer;
  }
  a {
    color: #666;
    text-decoration: none;
  }
  a:hover {
    color: #c81623;
  }
  button,
  input {
    font-family: Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB,
      "\5B8B\4F53", sans-serif;
      /* 边框、轮廓不需要 */
      border: 0;
      outline: none;
  }
  body {
    -webkit-font-smoothing: antialiased;
    background-color: #fff;
    font: 12px/1.5 Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB,
      "\5B8B\4F53", sans-serif;
    color: #666;
  }
  .hide,
  .none {
    display: none;
  }
  .clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0;
  }
  .clearfix {
    *zoom: 1;
  }
